Lettuce knives have grown in popularity over the last decade as their plastic blades do not oxidize lettuce leaves as quickly as a metal-bladed knives. If you have access to plexiglass scrap you can easily make your own unique lettuce knife that, despite the name, also is well-adapted to cutting tomatoes, cakes, and soft breads.

Instructables user MDWoodart picked up a scrap piece of plexiglass from a local hardware store for pennies-on-the-dollar. He cut out the basic knife shape as well as extra blocks for the handles. He used superglue to join the blocks to each side of the handle and clamped them in place until the glue was set and then used a belt sander to sharpen the blade. When the edge was acceptable he then polished the edge by using progressively finer sandpaper and finally polished it with a buffing wheel. He then wanted a thick handle so he added more handle scales to fit.

In the end you'll have a knife that is handy if you like salads, saved a few bucks if you found the scrap plexiglass for cheap, and can proudly say you've made your own knife.